广西某铜铅锌重晶石矿地球化学特征及其地质意义

以岩石、同位素地球化学等测试结果为基础,对广西象州县境内某铜铅锌重晶石矿的矿床地质特征、成因及其成矿时代进行了研究。结果表明:矿区的矿化受构造破碎带控制;重晶石硫来源于泥盆系中封存的、与沉积物同时沉积的海水或膏盐;铜铅锌钡矿源层以泥盆系为主,部分来自深源的岩浆;含矿溶液为雨水经地下深循环形成的含矿热卤水;成矿温度约为170℃,属中-低温热液型矿床;矿床形成时代为印支-燕山早期。研究结果为该铜铅锌重晶石矿的下一步地质勘查工作奠定了基础。

Geochemical characteristics of a copper-lead-zinc-barite deposit in Guangxi and their geological implications

Based on the data of lithogeochemistry and isotope geochemistry, the authors studied geological characteristics,genesis and metallogenic epoch of a certain copper-lead-zinc-barite deposit in Xiangzhou County of Guangxi. Some conclusions have been reached：mineralization of the ore district was controlled by the structural fracturing zone;sulfur in the barite resulted from sea and gypsum-salt of Devonian period;the source beds of copper, lead, zinc and barium were mainly Devonian strata and subordinately deep magma;the ore-bearing solution was hot brine from underground deep cycle water;the metallogenic temperature was about 170℃;the copper-lead-zinc-barite deposit was a mesothermal-epithermal deposit;the metallogenic epoch was early Indosinian-early Yanshanian period. The re-sults obtained by the authors lay the foundation for the further geological exploration.